P/F ratio = oxygenation. 呼吸状態を評価するうえで最も基本的で、しかし非常に重要な指標です。 PaO₂（動脈血の酸素分圧）を、吸入している酸素濃度であるFiO₂で割った値で、 「いま体がどれだけ酸素を取り込めているか」をシンプルに数値化できます。 集中治療や人工呼吸管理では、 P/F比は重症度の目安として頻繁に用いられ、 ARDSの診断基準にも組み込まれています。 #小児科 #集中治療 #看護師 #人工呼吸器 #呼吸療法認定士
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